414 WILLIAM T. M. FORBES 



rarely, partly filled with white; the outer boundaries of the dark base inwardly 

 oblique to the dorsal margin ; a white dorsal patch, filling the space between the 

 dark base and portmedial patch, usually irregularly quadrangular, with anterior 

 sides roughly parallel and cut off squarely in the middle of the wing; sometimes 

 with a narrow extension between the two postmedial patches. Speculum light 

 gray with some black in the middle; costa with double striae toward apex. 

 15 mm. (Moiwsphragis Clemens.) 



June to September. Larva boring in pith and wood of stems of Bidens; hiber- 

 nating as a larva in the dead stalks. 



Common and general in distribution. New York: Peru, Ithaca, Big Indian 

 Valley. 



4. E. boxcana Kearfott. Dull gray-brown, shading into deep brown on inner 

 margin, especially between the median dorsal patch and the speculum. Outer 

 half of costa with paler gray and darker brown oblique striations, fading out 

 below. Middle of inner margin with a contrastingly paler, sometimes whitish 

 patch, made up of four or five whitish striations, converging to their tips near 

 the middle of the wing, and more or less fused; practically as in several 

 Laspeyresias. Speculum contrasting, pale blue-gray, with a couple of black dots. 

 Rase of fringe more or less powdery. Hind wing concolorous. 15 mm. 



May. 



New Hampshire to Texas and Iowa. 



5. E. abbreviatana Walker. Pale gray, dusted with blackish, with a slight blue 

 tint; base and outer part a little darker. Antemedial line obscure toward costa. 

 erect, and a little irregular, below. A few geminate white strise toward apex. 

 Speculum of two vague lead -gray bands, with some black dots between them, 

 preceded by a brown area containing black dots. Fringe powdery gray. One 

 of the smallest of the genus. 10 mm. 



May and June. 



New Hampshire to Toronto, Ontario, and Missouri; south to the District of 

 Columbia. 



6. E. culminana Walsingham. Light gray; strigose; the base slightly darker. 

 A rounded, triangular, deep brown patch resting on costal two-thirds of outer 

 margin, enclosing a pale gray marginal spot, and a small, subtriangular black- 

 brown spot on inner margin before the anal angle, the space between the two 

 more shining. Fringe deep brown, contrasting, with black basal line; white at 

 the anal ansrle. Hind wing pale gray. Head and collar deep brown. 16 mm. 



August and September. 



Massachusetts to District of Columbia, Manitoba, Washington, and Colorado. 



This species approaches Rhyacionia picicola closely in appearance, but is smaller. 

 with browner patches, and has a strong costal fold. Its dark head is also 

 distinctive. 



7. E. briehtonana Kearfott. Wings broad. Grayish brown, with dark brown 

 patches; the one near the base of the inner margin large, as wide as high, and 

 stronorlv contrasting; a narrow oblique fascia from middle of costa to end of cell, 

 followed bv some double pale costal striae with dark streaks between them. Apical 

 reerion brown, more widely on the costa where it contains a double pale stria. 

 the brown tapering to a point near anal angle. A small spot on outer part of 

 inner margin. Speculum obscure, somewhat shining, with a vertical darker streak 

 in the middle. 12-15 mm. 



August. 



New Brighton, Pennsylvania. New York: Ithaca. 



8. E. tardaa Kearfott. Wings rather broad, dull gray, like dorsisianatana. 

 A triantnilar blackish antemedial patch on inner margin, reaching ut> to the fold: 

 and a triangular apical patch; extending, on the costa, from four-fifths way out 

 to apex, and down to Cu on the outer margin; but separated from the outer 



